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3 Sheets-Sheet 1..

(No Model.) F.. B.- HILL.

REFRIGERATING APPARATUS.

Patented Sept.v 19, 1893.

(No Model.) a sheetssheet 2. I'. B. HILL.

REFRIGERATING APPARATUS.

Patented Sept. 19, 1893 (No Model.) s sheetssheen a I'. B. HILL. REFRIGBRATING APPARATUS.

Patented sept. 19, 1893.

UNITED STATES PATENT OEEICE.

FREDERICK BARKER HILL, OF LONDON, ENGLAND, ASSIGNOR TO THE HILLS COLD STORAGE COMPANY, LIMITED, OF SAME PLACE.

REERIGERATING APPARATUS.

SPECIFICATION forming part of Letters' Patent No. 505,359, dated September 19, 1893.

Application tiled .Tune 9, 1392. Senal'No. 436.165. (No model.) Patented in England December 16. 1890, No. 20,509.

To all whom t may concern:

Be it known that I, FREDERICK BARKEE.

' 5 have invented new and useful Improvements in Refrigerating and Ice-Making Apparatus, (for which I have obtained a patent in Great Britain, No. 20,509, bearing date December 16, 1890,) of which the following is a xo specification, reference being had to the accompanying drawings.

My invention relates to refrigerating and ice-making apparatus and comprises various improvements hereinafter described.

One object of my said invention is to provide in asimple and efficient manner for simultaneously cooling and drying air, and for circulating the same through one or more cooling chambers, or for otherwise utilizing it.

My said invention partly consists in the combination of a tubular or annular refrigerating chamber, a rotating screw-blade or conveyer which slowly rotates in contact with the surface of the said chamber, so that it scrapes the frost or snow from the surface thereof and conveys it away to a suitable box or receptacle in which it can be used for cooling purposes, or whence it can be removed from time to time in any convenient 3o manner to be used for cooling purposes, a

casing inclosing the said chamber and having inlet and outlet apertures, and means for circulating air through the said casing in contact with the inner and outer walls of the said chamber. Or, in place of the Scrapers, I use spiral brushes arranged to rotate in contact with the refrigerating surfaces.

My said invention further consists in the combination of an annular or tubular re- 4o frigerating chamber, a rotary helical blade or conveyer extending through the same in contact with the inner cylindrical wall thereof, another rotary helical blade or conveyer which works in contact with the outer cylindrical wall of the said refrigerating chamber,

and a casing surrounding the said refrigerating chamberand through which a cold carrier, such as air, is circulated.`

In the accompanying drawings I haveshown 5o how my said invention may be conveniently and advantageously carried lnto practice.

Figure lis a longitudinal central section of one form of my improved apparatus, the screw-conveyer and scraper being shown in side elevation. Fig. 2 is a transverse section on the line m, Fig. l. Fig. 3 is a plan, partly in horizontal section, showing a cooling chamber with my improvements applied thereto. Fig. 4 is a side elevation, partly in vertical section; and Fig. 5 a plan, partly in horizontal section on dierent planes illustrating another form or modification of 'my apparatus. Fig. 6 is a transverse section illustrating a further modification of my invention. Fig. 7 is a sectional elevation showing means for removing hoar frost or snow from both the interior and exterior walls of the refrigerating chamber.

Like letters indicate corresponding parts throughout the drawings.

Referring to Figs. 1 and 2, a is a refrigerating chamber of annular form in transverse section, which is supported centrally within a suitable casing b. T-he space c between the chamber a and casing b is closed at one end by a partition c and is partially closed at the other end by a partition c2 having one or more apertures in it, as at c3. The said casing is, moreover, provided with an inlet-pipe d and an outlet-pipe e. i

To provide for the removal of the hoar frost or snow from the interior wall of the refrigerating chamber a, a screw conveyer` f is arranged to rotate in contact with the said wall. This screw-conveyer is mounted upon a shaft g, which is supported in suitable bearings g at the ends of the casingb, and which is provided with a pulley h whereby it may be driven by a band or belt from a suitable motor. Thesaid screw-conveyer serves as a scraper fon-removing the hoar frost or snow from the surface of the chamber a and also as a conveyer for withdrawing the hoar` frost or snow from the space inclosed by the said chamber into a box or receptacle' 0l, whence it may be removed from time to time to be utilized for cooling purposes.

The air to be cooled is to be eitherforced or drawn through the apparatus by a fan or blower or by other suitable means. The said air enters by the inlet-pipe d and iows through the space inclosed by the annular refrigerat- IOO ing chamber a in contact with the interior wall of the said chamber, the screw f tending to cause the air to travel in a helical path; the air then passes through the aperture or apertures c3 in the partition e2 and flows through the space c in contact with the exterior wall of the said chamber, and isv discharged through the outlet-pipe e. The air is thus cooled and dried by its contact with both the interior wall and the exterior wall of the said refrigerating chamber.

It is evident that any moisture contained in the air will be deposited chiefly upon the inner Wall of the chamber@ and Will be converted thereon into hoar frost or snow, which will be removed therefrom, as it is formed, by the, screw-conveyer and scraper f, whereby it will be drawn into the box or receptacle t.

In Fig. 3,3' is, a cooling chamber Whichl is connected by a pipe 7c with a fan Z for drawing the air from the said chamber and forcing it through the inlet-pipe d intothe casing b. The outlet-pipe e of the said casing is connected with a pipe m through which the air after being cooled and dried by contact withl the surfaces of the `refrigerating chamber a, is returnedto the cooling chamber j.

For convenience of description, I use the term refrigerating chamber to indicate the chamber in w-hich the cold is produced, or

ber wherein they cold yis produced, and the term cooling chamber to indicate the chamber in which the cooled and dried air is utilized.

In Figs. 4 and 5 I have shown a modification of my invention wherein four refrigerating chambers a provided with scrapers or conveyers as above described, are arranged within a single casing h connected with a series of cooling chambers j by pipes k, fm. chambers er are of annular'form in transverse section, and suitable partitions c4 are arranged in the casing b so that the air will iiow through the chambers c in succession. Other partitions c5 are, moreover, provided in the said casing, so that the air, after it has passed through the chambers a will pass around the said chambers in succession, as indicated by the arrows in Fig. 4. The screw-conveyersf in the apparatus shown in Figs. 4 and 5 are driven by means of Worms formed or ixed on a shaft h2 and geared with worm-wheels h3 xed on the shafts g as more clearly show in Fig. 6. Y.

In Fig. 6 I have shown a further modificationof my said invention, in which I employ a tank n of brine or other non-congealable The said liquid, having immersed therein a number of refrigerating chambers a and a number of tubes p through which is to be passed the air to be cooled, and which are provided with screW-conveyers or Scrapers f as above described, arranged to be driven by worms h fixedA on a shaft h2 and geared with worm# Wheels h3 fixed on the shafts g.

It is evident that, if desired, other suitable means may be employed for removing the hoar frost or snow from the interior surface of the tubesp as it is formed thereon.

The brine contained in the tank 'n may be used as a store of cold, or may be circulated through an ice-making machine. It is, moreover, obvious that, instead of arranging the refrigerating tubes a in the tank n, a coldcarrier, such as brine, from any' suitable refrigerator may be caused to circulate around A theV tubes-p to. cool the air passing through the.

same.

Fig. 7 shows an apparatus wherein provision is made for the removal of the hoar frost or snow froml both thel interior and exterior walls of the refrigerating` chamber a. The

i. said chamber is, in this case, arranged vertically, and a screw-conveyer and scraper u surrounding the said chamber,is carried by rods t" firmly attached to a cross-bar c2 fixed on the shaft g. This shaft is driven through ,the medium of bevel gear-wheels w, w. into which a cold-carr1er, such as brine isY i conducted from a tank containing the cham- What I claim isl. The combination of an annular refrigerating chamber, a casing surrounding the same and provided with inlet and outlet apertures,

g a rotary helical blade or conveyor which Works in contact with the cylindrical wall of the said refrigerating chamber, and means for circulating air through the said casing inv contact with the inner and outer walls of the said refrigerating chamber, substantially as and for the purposes above specified.

2. The combination with an annular refriglerating chamber, of a rotary helical blade or conveyer extending through they same in contact with the inner cylindrical wall thereof, another rotary helical blade or conveyer y which Works in contact with the outercylindrical wall of the said refrigerating chamber, and a chamber or casing surrounding the said refrigerating chamber and through which a cold carrier is circulated, substantially as and for the purposes specied.

FREDERICK BARKER HILL.

Witnesses:

J oHN T. KNoWLEs, DAVID YOUNG. Both of 11; cmd l2 Southampton Buildings,

London, T/V. C'.

IOO

IIC 

